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41
Subjective

Match the hydrocarbons in Column I with the boiling points given in Column II.

Column I Column II
A. n-pentane 1. 282.5 K
B. iso-pentane 2. 309 K
C. neo-pentane 3. 301 K

Explanation

A - (2), B - (3), C - (1)

Column I Column II
A. n-pentane 1. 309 K due to no branch
B. iso-pentane 2. 301 K due to one branch
C. neo-pentane 3. 282.5 K due to two branches

42
Subjective

Match the following reactants in Column I with the corresponding reaction products in Column II.

Column I Column II
A. Benzene $+\mathrm{Cl}_2 \xrightarrow{\mathrm{AlCl}_3}$ 1. Benzoic acid
B. Benzene $+\mathrm{CH}_3 \mathrm{Cl} \xrightarrow{\mathrm{AlCl}_3}$ 2. Methyl phenyl ketone
C. Benzene $+\mathrm{CH}_3 \mathrm{COCl} \xrightarrow{\mathrm{AlCl}_3}$ 3. Toluene
D. Toluene $\xrightarrow{\mathrm{KMnO}_4 / \mathrm{NaOH}}$ 4. Chlorobenzene
5. Benzene hexachloride

Explanation
A - (4), B - (3), C - (2), D - (1)

Reactants Products
A. Benzene $+\mathrm{Cl}_2 \xrightarrow{\mathrm{AlCl}_3}$
B. Benzene $+\mathrm{CH}_3 \mathrm{Cl} \xrightarrow{\mathrm{AlCl}_3}$
C. Benzene $+\mathrm{CH}_3 \mathrm{COCl} \xrightarrow{\mathrm{AlCl}_3}$
D. Toluene $\xrightarrow{\mathrm{KMnO}_4 / \mathrm{NaOH}}$

43
Subjective

Match the reactions given in Column I with the reaction types in Column II.

Column I Column II
A. $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{H}^{+}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}$ 1. Hydrogenation
B. $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow{\mathrm{Pd}} \mathrm{CH}_3-\mathrm{CH}_3$ 2. Halogenation
C. $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{Cl}_2 \longrightarrow \mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Cl}$ 3. Polymerisation
D. $3 \mathrm{CH} \equiv \equiv\mathrm{CH} \xrightarrow[\text { Heat }]{\text { Cutube }} \mathrm{C}_6 \mathrm{H}_6$ 4. Hydration
5. Condensation

Explanation

A - (4), B - (1), C - (2), D - (3)

Reactions Types of reaction
A. $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{H}^{+}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}$ Hydration Addition of water
B. $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow{\mathrm{Pd}} \mathrm{CH}_3-\mathrm{CH}_3$ Hydrogenation Addition of hydrogen
C. $\mathrm{CH}_2==\mathrm{CH}_2+\mathrm{Cl}_2 \longrightarrow \mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Cl}$ Halogenation Addition of halogen
D. $3 \mathrm{CH} \equiv \equiv\mathrm{CH} \xrightarrow[\text { Heat }]{\text { Cutube }} \mathrm{C}_6 \mathrm{H}_6$ Polymerisation

44
MCQ (Single Correct Answer)

Assertion (A) The compound tetraene has the following structural formula.

It is cyclic and has conjugated $8 \pi$-electron system but it is not an aromatic compound. Reason (R) $(4 n+2) \pi$ electrons rule does not hold good and ring is not planar.

A
Both A and R are correct and R is the correct explanation of A
B
Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A$
C
Both A and R are not correct
D
A is not correct but R is correct
45
MCQ (Single Correct Answer)

Assertion (A) Toluene on Friedal Crafts methylation gives $o$ - and $p$ xylene. Reason (R) $\mathrm{CH}_3$-group bonded to benzene ring increases electron density at $o$ - and $p$ - position.

A
Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$
B
Both A and R are correct but R is not the correct explanation of A
C
Both A and R are not correct
D
A is not correct but R is correct